How to draw and add a polygon to the attributes table

Question

Hello 🙂

I have a WPF window and I created a "Draw" button. This button minimize the wpf window and I would like to be able to draw some points on simple click, draw the polygon based on points on double click, then set the polygon to a row of the attributes table (in my feature layer) and maximize the wpf window.

I instantiate a "class Draw : MapTool" when I click on the "Draw" button, and try to draw some points on a graphic layer based on an example I found, but it doesn't work (and I don't want to let a graphic layer in my content). I know how to get/set the attributes table but the "draw" functions is the real problem. Is there an other way to do that please ?

Thank you ! 🙂

Wolf · Accepted Answer

The attached project performs your workflow using a dockpane (not a WPF window).   The project works on 2.7 or newer.

Wolf · Accepted Answer

I coded your sample snippet in the code below and also found a bug in my attached solution. First be bug: The ICommand property in the viewmodel was not named properly it should have been named: ///

/// hook existing ArcGIS Pro Tool Button ///

public ICommand CmdCreatePolygon => FrameworkApplication.GetPlugInWrapper("CreatePolygon_PolygonTool") as ICommand; Second: here is my test snippet that shows the chained edit operation (on the same layer): ///

/// Fires once the user completes the on-screen sketch. In the context of a construction tool the sketch geometry /// is used for the shape of the feature. ///

/// The sketch geometry the user digitized on the screen. /// protected override Task OnSketchCompleteAsync(Geometry geometry) { // find and use the first polygon layer var _polygonLayer = MapView.Active.Map.GetLayersAsFlattenedList().OfType().Where(lyr => lyr.ShapeType == esriGeometryType.esriGeometryPolygon).FirstOrDefault(); if (_polygonLayer == null) { MessageBox.Show("Cannot find a Polygon layer to save constructed geometries"); } if (geometry == null || _polygonLayer == null) return Task.FromResult(false); var dockPane = Module1.ActiveDockPane; if (dockPane == null) { MessageBox.Show($@"Unable to find the Add Polygon dockpane"); } return QueuedTask.Run(() => { // create an edit operation var editOperation = new EditOperation { Name = $@"Create polygon in '{_polygonLayer.Name}'", ProgressMessage = "Working...", CancelMessage = "Operation canceled", ErrorMessage = "Error creating point" }; long newObjectID = -1; // update attributes Dictionary attributes = new Dictionary { { "TheString", "First edit operation" } }; // queue the edit operation using the sketch geometry as the shape of the feature editOperation.Create(_polygonLayer, geometry, object_id => newObjectID = object_id); dockPane.UpdateStatusText($@"Created a polygon in '{_polygonLayer.Name}'"); //execute the operation if (!editOperation.Execute()) { return Task.FromResult(false); } // chain to create a new operation var opChain = editOperation.CreateChainedOperation(); attributes["TheString"] = "Chained operation"; opChain.Modify (_polygonLayer, newObjectID, attributes); return opChain.ExecuteAsync(); }); } and here is the result, which shows that the chained edit did update the attribute table (by updating the "TheString" field with the "Chained operation" status: